From: CJ <cj@cjcj.com>
To: Linux Kernel Development <linux-kernel@vger.kernel.org>
Subject: IDE performance 2.4.18 slower than MSDOS
Date: Sun, 14 Apr 2002 16:20:13 -0700 [thread overview]
Message-ID: <3CBA0EAD.205@cjcj.com> (raw)
These are for an unmounted Seagate 80GB IDE Primary
ST380021A DMA in a Celeron 466, Intel 815BN, 256MB.
dd 4.0.36 linux-2.4.18--------
MB/s Input Output Hdparm
DOS 42.10 ? -Tt
/dev/hda 36.36 19.94 37.21
/dev/raw 2.86 3.28 98.46
Linux 2.4.18
time dd if=/dev/hda of=/dev/nul
301.6user 1093system 36:41.05elapsed 63%cpu
36.36MB/s
time dd if=/dev/raw/raw80 of=/dev/nul
690.95user 5060.35system 7:31:39elapsed 21%cpu
(IDE light dim)
2.86MB/s
time dd if=/dev/zero of=/dev/raw/raw80
626.32user 7570.34system 6:46:39elapsed 33%cpu
(IDE light dim)
3.28MB/s
time dd if=/dev/zero of=/dev/hda
304.34user 1413system 1:06:54elapsed 42%cpu
(IDE light medium 123456, IDE light off 789)repeats throughtout
19.94MB/s
reply other threads:[~2002-04-14 23:20 UTC|newest]
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